# Tag Info

## New answers tagged plasma-physics

1

Short answer: plasma ball emits RF "noise". The touch screen is sensitive to noise (as it tries to detect the presence of your finger by detecting very tiny currents that appear between transparent electrodes as a result of the presence of your finger (which is dielectrically different than air ). Hoping someone else will elaborate for you.

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Well, plasmas are actually inherently unstable. Meaning, they will not relax to a Maxwellian velocity distribution in many cases unless the collision rates are very high (e.g., in the sun's chromosphere and below). Plasmas tend to have sources of free energy (e.g., non-Maxwellian features like relative streaming of two groups of particles or temperature ...

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The key properties of plasma that depend on the ion size are: 1) Electric conductivity since it depends on Coulomb scattering of electrons on ions and the rate of it scales as the ion charge squared 2) Radiation properties - for fully ionized plasmas the bremsstralung (braking) radiation due to the Coulomn scattering of electrons on ions strongly grows with ...

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Joule heating is typically associated with increases in random kinetic energy (i.e., heat) due to $\mathbf{j} \cdot \mathbf{E}$. Ohmic dissipation and resistive heating are similar in a sense to Joule heating, as all three result from fluctuating electric fields acting as an effective drag force on an otherwise free flowing charged particle. Ion drag is ...

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Yes. Plasma consists of ionized matter. Which contains cathode rays (electrons) which are indipendant of the matter and positive rays ( nucleii) which depen on the matter ionized. So as plasma is a mixture of both it shows a significant physical difference. Eg: Density, Charge/Mass ratio, Effect due to Electro-magnetic fields

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Like is gold plasma more dense than iron's? If you mean mass density, then for the same ion number density and charge state (assuming quasi-neutrality) the gold plasma would have a higher mass density than that of iron. If you mean number density, then that would depend upon how the plasma was formed and under what conditions it currently exists (i.e., ...

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